McQuay MWH

MCQUAY Service Guide Book Diagnosis
42
7.0 SERVICE DIAGNOSIS
7.1 LED Lights Diagnosis Table
Wall Mounted F Series Cooling Only
Model Board Handset
MWM 10/15/20/25F, 311 D2.0 G7
MWM 07/10/15/20/25F L2EF G7
POWER
(Green)
SLEEP
(Red)
TIMER
(Orange)
DRY
(Orange)
Operation / Faulty
Indication
Action
Timer On -
Sleep mode On -
Dry mode -
Defrost mode -
Room air sensor
contact loose / short
Check room sensor connection /
change room sensor
Indoor coil sensor
contact loose / short
Check indoor coil sensor
connection / change indoor coil
sensor
Gas leak
Check for leakage & repair / Top
up refrigerant
/ ON ON or OFF BLINKING
/
/
Continuously
Once every 2s
3 times every 2s
Twice every 2s